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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .parent p{
            background-color: blue;
        }
        .parent>p{
            color: white;
            background-color: pink;
        }
        *{
           margin: 0;
           padding: 0;
           list-style: none;
        }
    </style>
</head>

<body>
    <div class="parent">
        <p>段落标签</p>
        <p>段落标签</p>
        <p>段落标签</p>
        <p>段落标签</p>
        <div>
            <p>段落标签</p>
            <p>段落标签</p>
            <p>段落标签</p>
            <p>段落标签</p>
        </div>
    </div>
    <!--无序列表 ul li块级元素 默认列表标志项是desc -->
    <ul type="cricle">
        <li>无序列表</li>
        <li>无序列表</li>
        <li>无序列表</li>
    </ul>
    <ol type="A">
        <li>有序列表</li>
        <li>有序列表</li>
        <li>有序列表</li>
    </ol>
</body>
</html>